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एक से अधिक उत्तर प्रकार के प्रश्न

Which one is/are related to secondary treatment regarding the steps of sewage treatment process?

इनमें से कौनसा/कौनसे वाहितमल उपचार प्रक्रिया के चरण के संदर्भ में द्वितीयक उपचार से संबंधित है/हैं?

BOD of sewage reduces along with DO

वाहितमल का बीओडी (BOD) डीओ (DO) के साथ घटता है

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It involves activity of heterotrophic bacteria and fungi

इसमें विषमपोषी जीवाणु तथा कवक की क्रियाविधि सम्मिलित होती है

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Methanogenic bacteria are used during the process

मिथेनोजनित जीवाणु इस प्रक्रिया के दौरान प्रयुक्त होते हैं

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It is aerobic as well as anaerobic process

यह वायवीय तथा अवायवीय प्रक्रिया है

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Solution

The correct option is D It is aerobic as well as anaerobic process

यह वायवीय तथा अवायवीय प्रक्रिया है
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The correct statement with regard to $H_{2}^{+}$ & $H_{2}^{-}$ is

(H_{2} O_{2})

(H_{2} {S O}_{4})

Assertion : For drying $H_{2} S$ , Conc. $H_{2} S O_{4}$ cannot be used.

Reason: Moist $H_{2} S$ is oxidized by Conc. $H_{2} S O_{4}$

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